mirror of
https://github.com/airwindows/airwindows.git
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332 lines
No EOL
12 KiB
C++
Executable file
332 lines
No EOL
12 KiB
C++
Executable file
/* ========================================
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* Console5Channel - Console5Channel.h
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* Copyright (c) 2016 airwindows, All rights reserved
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* ======================================== */
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#ifndef __Console5Channel_H
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#include "Console5Channel.h"
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#endif
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void Console5Channel::processReplacing(float **inputs, float **outputs, VstInt32 sampleFrames)
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{
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float* in1 = inputs[0];
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float* in2 = inputs[1];
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float* out1 = outputs[0];
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float* out2 = outputs[1];
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double overallscale = 1.0;
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overallscale /= 44100.0;
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overallscale *= getSampleRate();
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double inputgain = A;
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double differenceL;
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double differenceR;
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double nearZeroL;
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double nearZeroR;
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double servoTrim = 0.0000001 / overallscale;
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double bassTrim = 0.005 / overallscale;
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long double inputSampleL;
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long double inputSampleR;
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if (settingchase != inputgain) {
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chasespeed *= 2.0;
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settingchase = inputgain;
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}
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if (chasespeed > 2500.0) chasespeed = 2500.0;
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if (gainchase < 0.0) gainchase = inputgain;
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while (--sampleFrames >= 0)
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{
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inputSampleL = *in1;
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inputSampleR = *in2;
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if (inputSampleL<1.2e-38 && -inputSampleL<1.2e-38) {
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static int noisesource = 0;
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//this declares a variable before anything else is compiled. It won't keep assigning
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//it to 0 for every sample, it's as if the declaration doesn't exist in this context,
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//but it lets me add this denormalization fix in a single place rather than updating
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//it in three different locations. The variable isn't thread-safe but this is only
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//a random seed and we can share it with whatever.
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noisesource = noisesource % 1700021; noisesource++;
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int residue = noisesource * noisesource;
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residue = residue % 170003; residue *= residue;
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residue = residue % 17011; residue *= residue;
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residue = residue % 1709; residue *= residue;
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residue = residue % 173; residue *= residue;
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residue = residue % 17;
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double applyresidue = residue;
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applyresidue *= 0.00000001;
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applyresidue *= 0.00000001;
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inputSampleL = applyresidue;
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}
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if (inputSampleR<1.2e-38 && -inputSampleR<1.2e-38) {
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static int noisesource = 0;
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noisesource = noisesource % 1700021; noisesource++;
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int residue = noisesource * noisesource;
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residue = residue % 170003; residue *= residue;
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residue = residue % 17011; residue *= residue;
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residue = residue % 1709; residue *= residue;
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residue = residue % 173; residue *= residue;
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residue = residue % 17;
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double applyresidue = residue;
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applyresidue *= 0.00000001;
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applyresidue *= 0.00000001;
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inputSampleR = applyresidue;
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//this denormalization routine produces a white noise at -300 dB which the noise
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//shaping will interact with to produce a bipolar output, but the noise is actually
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//all positive. That should stop any variables from going denormal, and the routine
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//only kicks in if digital black is input. As a final touch, if you save to 24-bit
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//the silence will return to being digital black again.
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}
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chasespeed *= 0.9999;
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chasespeed -= 0.01;
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if (chasespeed < 350.0) chasespeed = 350.0;
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//we have our chase speed compensated for recent fader activity
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gainchase = (((gainchase*chasespeed)+inputgain)/(chasespeed+1.0));
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//gainchase is chasing the target, as a simple multiply gain factor
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if (1.0 != gainchase) {
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inputSampleL *= gainchase;
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inputSampleR *= gainchase;
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}
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//done with trim control
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differenceL = lastSampleChannelL - inputSampleL;
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lastSampleChannelL = inputSampleL;
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differenceR = lastSampleChannelR - inputSampleR;
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lastSampleChannelR = inputSampleR;
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//derive slew part off direct sample measurement + from last time
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if (differenceL > 1.0) differenceL = 1.0;
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if (differenceL < -1.0) differenceL = -1.0;
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if (differenceR > 1.0) differenceR = 1.0;
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if (differenceR < -1.0) differenceR = -1.0;
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//clamp the slew correction to prevent invalid math results
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differenceL = lastFXChannelL + asin(differenceL);
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differenceR = lastFXChannelR + asin(differenceR);
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//we're about to use this twice and then not use difference again, so we'll reuse it
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//enhance slew is arcsin(): cutting it back is sin()
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iirCorrectL += inputSampleL - differenceL;
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inputSampleL = differenceL;
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iirCorrectR += inputSampleR - differenceR;
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inputSampleR = differenceR;
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//apply the slew to stored value: can develop DC offsets.
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//store the change we made so we can dial it back
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lastFXChannelL = inputSampleL;
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lastFXChannelR = inputSampleR;
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if (lastFXChannelL > 1.0) lastFXChannelL = 1.0;
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if (lastFXChannelL < -1.0) lastFXChannelL = -1.0;
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if (lastFXChannelR > 1.0) lastFXChannelR = 1.0;
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if (lastFXChannelR < -1.0) lastFXChannelR = -1.0;
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//store current sample as new base for next offset
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nearZeroL = pow(fabs(fabs(lastFXChannelL)-1.0), 2);
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nearZeroR = pow(fabs(fabs(lastFXChannelR)-1.0), 2);
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//if the sample is very near zero this number is higher.
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if (iirCorrectL > 0) iirCorrectL -= servoTrim;
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if (iirCorrectL < 0) iirCorrectL += servoTrim;
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if (iirCorrectR > 0) iirCorrectR -= servoTrim;
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if (iirCorrectR < 0) iirCorrectR += servoTrim;
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//cut back the servo by which we're pulling back the DC
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lastFXChannelL += (iirCorrectL * 0.0000005);
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lastFXChannelR += (iirCorrectR * 0.0000005);
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//apply the servo to the stored value, pulling back the DC
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lastFXChannelL *= (1.0 - (nearZeroL * bassTrim));
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lastFXChannelR *= (1.0 - (nearZeroR * bassTrim));
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//this cuts back the DC offset directly, relative to how near zero we are
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if (inputSampleL > 1.57079633) inputSampleL= 1.57079633;
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if (inputSampleL < -1.57079633) inputSampleL = -1.57079633;
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inputSampleL = sin(inputSampleL);
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//amplitude aspect
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if (inputSampleR > 1.57079633) inputSampleR = 1.57079633;
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if (inputSampleR < -1.57079633) inputSampleR = -1.57079633;
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inputSampleR = sin(inputSampleR);
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//amplitude aspect
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//stereo 32 bit dither, made small and tidy.
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int expon; frexpf((float)inputSampleL, &expon);
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long double dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62);
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inputSampleL += (dither-fpNShapeL); fpNShapeL = dither;
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frexpf((float)inputSampleR, &expon);
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dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62);
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inputSampleR += (dither-fpNShapeR); fpNShapeR = dither;
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//end 32 bit dither
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*out1 = inputSampleL;
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*out2 = inputSampleR;
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*in1++;
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*in2++;
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*out1++;
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*out2++;
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}
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}
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void Console5Channel::processDoubleReplacing(double **inputs, double **outputs, VstInt32 sampleFrames)
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{
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double* in1 = inputs[0];
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double* in2 = inputs[1];
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double* out1 = outputs[0];
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double* out2 = outputs[1];
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double overallscale = 1.0;
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overallscale /= 44100.0;
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overallscale *= getSampleRate();
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double inputgain = A;
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double differenceL;
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double differenceR;
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double nearZeroL;
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double nearZeroR;
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double servoTrim = 0.0000001 / overallscale;
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double bassTrim = 0.005 / overallscale;
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long double inputSampleL;
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long double inputSampleR;
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if (settingchase != inputgain) {
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chasespeed *= 2.0;
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settingchase = inputgain;
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}
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if (chasespeed > 2500.0) chasespeed = 2500.0;
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if (gainchase < 0.0) gainchase = inputgain;
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while (--sampleFrames >= 0)
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{
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inputSampleL = *in1;
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inputSampleR = *in2;
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if (inputSampleL<1.2e-38 && -inputSampleL<1.2e-38) {
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static int noisesource = 0;
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//this declares a variable before anything else is compiled. It won't keep assigning
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//it to 0 for every sample, it's as if the declaration doesn't exist in this context,
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//but it lets me add this denormalization fix in a single place rather than updating
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//it in three different locations. The variable isn't thread-safe but this is only
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//a random seed and we can share it with whatever.
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noisesource = noisesource % 1700021; noisesource++;
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int residue = noisesource * noisesource;
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residue = residue % 170003; residue *= residue;
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residue = residue % 17011; residue *= residue;
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residue = residue % 1709; residue *= residue;
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residue = residue % 173; residue *= residue;
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residue = residue % 17;
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double applyresidue = residue;
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applyresidue *= 0.00000001;
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applyresidue *= 0.00000001;
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inputSampleL = applyresidue;
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}
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if (inputSampleR<1.2e-38 && -inputSampleR<1.2e-38) {
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static int noisesource = 0;
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noisesource = noisesource % 1700021; noisesource++;
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int residue = noisesource * noisesource;
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residue = residue % 170003; residue *= residue;
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residue = residue % 17011; residue *= residue;
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residue = residue % 1709; residue *= residue;
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residue = residue % 173; residue *= residue;
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residue = residue % 17;
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double applyresidue = residue;
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applyresidue *= 0.00000001;
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applyresidue *= 0.00000001;
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inputSampleR = applyresidue;
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//this denormalization routine produces a white noise at -300 dB which the noise
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//shaping will interact with to produce a bipolar output, but the noise is actually
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//all positive. That should stop any variables from going denormal, and the routine
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//only kicks in if digital black is input. As a final touch, if you save to 24-bit
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//the silence will return to being digital black again.
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}
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chasespeed *= 0.9999;
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chasespeed -= 0.01;
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if (chasespeed < 350.0) chasespeed = 350.0;
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//we have our chase speed compensated for recent fader activity
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gainchase = (((gainchase*chasespeed)+inputgain)/(chasespeed+1.0));
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//gainchase is chasing the target, as a simple multiply gain factor
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if (1.0 != gainchase) {
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inputSampleL *= gainchase;
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inputSampleR *= gainchase;
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}
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//done with trim control
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differenceL = lastSampleChannelL - inputSampleL;
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lastSampleChannelL = inputSampleL;
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differenceR = lastSampleChannelR - inputSampleR;
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lastSampleChannelR = inputSampleR;
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//derive slew part off direct sample measurement + from last time
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if (differenceL > 1.0) differenceL = 1.0;
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if (differenceL < -1.0) differenceL = -1.0;
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if (differenceR > 1.0) differenceR = 1.0;
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if (differenceR < -1.0) differenceR = -1.0;
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//clamp the slew correction to prevent invalid math results
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differenceL = lastFXChannelL + asin(differenceL);
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differenceR = lastFXChannelR + asin(differenceR);
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//we're about to use this twice and then not use difference again, so we'll reuse it
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//enhance slew is arcsin(): cutting it back is sin()
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iirCorrectL += inputSampleL - differenceL;
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inputSampleL = differenceL;
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iirCorrectR += inputSampleR - differenceR;
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inputSampleR = differenceR;
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//apply the slew to stored value: can develop DC offsets.
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//store the change we made so we can dial it back
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lastFXChannelL = inputSampleL;
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lastFXChannelR = inputSampleR;
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if (lastFXChannelL > 1.0) lastFXChannelL = 1.0;
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if (lastFXChannelL < -1.0) lastFXChannelL = -1.0;
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if (lastFXChannelR > 1.0) lastFXChannelR = 1.0;
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if (lastFXChannelR < -1.0) lastFXChannelR = -1.0;
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//store current sample as new base for next offset
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nearZeroL = pow(fabs(fabs(lastFXChannelL)-1.0), 2);
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nearZeroR = pow(fabs(fabs(lastFXChannelR)-1.0), 2);
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//if the sample is very near zero this number is higher.
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if (iirCorrectL > 0) iirCorrectL -= servoTrim;
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if (iirCorrectL < 0) iirCorrectL += servoTrim;
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if (iirCorrectR > 0) iirCorrectR -= servoTrim;
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if (iirCorrectR < 0) iirCorrectR += servoTrim;
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//cut back the servo by which we're pulling back the DC
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lastFXChannelL += (iirCorrectL * 0.0000005);
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lastFXChannelR += (iirCorrectR * 0.0000005);
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//apply the servo to the stored value, pulling back the DC
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lastFXChannelL *= (1.0 - (nearZeroL * bassTrim));
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lastFXChannelR *= (1.0 - (nearZeroR * bassTrim));
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//this cuts back the DC offset directly, relative to how near zero we are
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if (inputSampleL > 1.57079633) inputSampleL= 1.57079633;
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if (inputSampleL < -1.57079633) inputSampleL = -1.57079633;
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inputSampleL = sin(inputSampleL);
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//amplitude aspect
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if (inputSampleR > 1.57079633) inputSampleR = 1.57079633;
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if (inputSampleR < -1.57079633) inputSampleR = -1.57079633;
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inputSampleR = sin(inputSampleR);
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//amplitude aspect
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//stereo 64 bit dither, made small and tidy.
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int expon; frexp((double)inputSampleL, &expon);
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long double dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62);
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dither /= 536870912.0; //needs this to scale to 64 bit zone
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inputSampleL += (dither-fpNShapeL); fpNShapeL = dither;
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frexp((double)inputSampleR, &expon);
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dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62);
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dither /= 536870912.0; //needs this to scale to 64 bit zone
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inputSampleR += (dither-fpNShapeR); fpNShapeR = dither;
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//end 64 bit dither
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*out1 = inputSampleL;
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*out2 = inputSampleR;
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*in1++;
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*in2++;
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*out1++;
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*out2++;
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}
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} |